World No 1 Novak Djokovic crushed Ploand's Lukasz Kubot 6-2, 6-4 to book a spot in the quarter-finals of the Swiss Indoors yesterday. 

The Serb next faces Florian Mayer. Meanwhile, Roger Federer needed ten aces and a fighting finish to beat Jarkko Nieminen 6-1, 4-6, 6-3 to secure a place in the quarter-finals.